The Six Books of Proclus on the Theology of Plato, Volume 2

For if it was inseparable from any body whatever, it would not have a certain energy separate from body.[216] For thus energy would be more excellent than essence; since the latter indeed would be indigent of bodies, but the former would be sufficient to itself, and would not be in want of bodies: If therefore any thing is essentially inseparable from body, it is also in a similar manner inseparable according to energy, or rather it is in a still greater degree inseparable. But if this be the case, it will not revert to itself. For that which is converted to itself being something different from body, has an energy separate from body, and not either through, or together with body, since the energy, and that to which the energy is directed, are not at all in want of body. Hence, that which is converted to itself, is entirely separate from bodies.